Motor vehicle ignition-starter switch

Abstract

The invention relates to a motor vehicle ignition-starter switch which is provided for the switching of a plurality of galvanically separated electric circuits. The switch wheel comprises lifting contact bridges, sliding contact bridges and a radially actuable slide with contact bridge. This slide cooperates simultaneously with the ignition repetitive catch.

I claim: 
     
       1. In a motor vehicle ignition-starter switch having a housing including a base part provided with a middle contact and a plurality of border contacts, a switch wheel having a first switching bridge permanently abutting the middle contact and arranged to be rotated into contact with border contacts on said base part, a bridging element having a double-contact head in contact with a contact of said first switching bridge and arranged to be rotated into contact with further border contacts, a further switching bridge, making contact through a take-off contact on said double-contact head and arranged to slidably engage said border contacts; the connecting bridges and the bridging element being pretensioned by springs toward the base part, and a springably pretensioned starting repetitive retaining element the improvement comprising: two ring segment contact bridges of the switch wheel on ring wall portions thereof, which cooperate with two contact spring pairs and being guided in a circumferential wall of the housing and an ignition repetitive retaining element in the form of a catch, pivotally supported on said switch wheel about an axis parallel to the switch wheel axis and a catching profile being arranged on a slide guided for radial sliding on said wheel toward said catch, a switch part extending perpendicular to the axis of the catch pivot and pretensioned towards the catch axis, said slide having a contact bridge thereon which cooperates with a further contact spring pair in the circumferential wall of the housing. 
     
     
       2. A motor vehicle ignition-starter switch according to claim 1, wherein the switch wheel has a receiving chamber, aligned in the direction of the switch wheel axis and housing a spring for the bridging element. 
     
     
       3. A motor vehicle ignition-starter switch according to claim 2, wherein the receiving chamber has a ring wall around which a guidance slot of the further switching bridge extends. 
     
     
       4. A motor vehicle ignition-starter switch according to claim 1, wherein the two ring segment contact bridges are provided on said switch wheel and are relatively displaceable in a radial direction. 
     
     
       5. A motor vehicle ignition-starter switch according to claim 4, wherein the two ring segment contact bridges are displaceable relatively to one another also in the circumferential direction, and wherein the cooperating contact spring pairs extend from the base part and abut the circumferential wall of the housing. 
     
     
       6. A motor vehicle ignition-starter switch according to claim 1, wherein the catching profile curve is provided as a triangle profile and wherein the catch comprises a triangle cam, cooperating with the triangle profile. 
     
     
       7. A motor vehicle ignition-switch according to claim 1, wherein the catch is between a switch wheel upper part and a switch wheel lower part, and wherein a guidance shoe on the catch extends through a cutout of the switch wheel upper part, the guidance shoe working together with profile curves on the housing. 
     
     
       8. A motor vehicle ignition-starter switch according to claim 7, wherein the guidance shoe comprises a locking edge which cooperates with an ignition repetitive locking cam on the housing. 
     
     
       9. A motor vehicle ignition-starter switch according to claim 7, wherein a circumferential wall of the housing defines a resetting profile upon which the guidance shoe engages when the switch wheel is rotated in one direction, and thereby switches over the catch automatically into its original position.